Improvement in water-wheel curbs



'iinttd glatte Betreut dtjijle.

WALTER S. DAVIS, WARNER, NEW HAMPSHIRE.

Letters Patent No. 112,128, dated February 28, 1871.

IMPROVEMENT IN WATER-WHEEL. CURBS.

The Schedule referred to in these Letters Patent and making part of the same.

I, WALTER S. Davis, of Warner, county of Merrimack and State of New Hampshire, haveinvented certain Improvements in Water-VVheel Curbs, of which the following is a specification.

Nature dnd Objects of the Invention.

The object o' my invention is to better' economize the power of water, and consists in arranging a number of gates `around the curb corresponding with the number of apertures, which are madepermanent in Description of Drawing.

Figure 1 is a perspective view ofthe curb, showing half the gates open and the manner in which the cams. operate them.

Figure 2 is a plan of the same, with a portion of the top removed, showing` the apertures or water-guides to the wheel; also, the conformation of the gates and the manner in which they are hinged to the curb.

The following is a general description of my inven tion, reference being had to the accompanyingdraw-A is the body of the curb, which should be su-bstantially made, to resist the pressure of the water and the vibrations of the operating parts.

B is the double circle of cams, which are quartered alternately into recesses and projections, two of each on the upper and lower sides of the cams.

The recesses C O G C receive the ends of the levers D D I) when the gates c e e are shut.

In rotating the cams by 4means of the rack E and pinion F, the projections G G are so arranged as to open two gates at a time to their fullextent, and on opposite sides of the curb, in alternate succession till the whole are open.l Y l On reversing the motion the Water closes the gates. i

The levers D D D are fastened to the gates at one end, and form the hinge of the gate and fulcruxn of the lever. y

H yH H are the apertures through which the water passes to the wheel, with the sides all straight and permanently attached to the curb, the leading or front side being tangent to the wheel.

Claims.

I claim as my invention* l. ,Ihe circle of cams B, quartered alternately into recesses .and project-ions, two of each on therupper and lower sides of the circle, so that when made to revolve it will open one or more gates alternately, substantially as set forth.

' 2. The circles having the cams B, quartered into recesses and projections, as described, in combination with the leversl) and gates e, when arranged to o'perate substantially as specified.

'VV-ALTER S. DAVIS.

Witnesses:

STILLMAN C. DAVIS, CHARLES P. SAWYER. 

